Ptolemy II copper coin - ID and verification?

I have been brought 6 more coins in the market for verification and possible purchase. All are outside my comfort zone, so I can I beg some assistance again?
Third is identified on it's ticket as Ptolemy II AE 26. Weighs 18.1g and measures about 25mm across. Is this correct ID, and any reason it should not be right?

 

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This actually might be either an Alexandrian Ptolemy II Diobol with Galatians shield


or the Hieron II type imitating it from Sicily.



My bet is the latter, cuz I can't see the Sigma above the shield and the style of Zeus bust and hair/Wreath.

 

This is one of those rare instances where, based on the photo, I am almost positive that it is legit.

 

Here is an outstanding, accurate, detailed yet easy to use web page to identify Ptolemaic bronzes. I strongly recommend saving it as a favorite:
http://ptolemybronze.com/ptolemy_series.html

 

I second @philologus_1,

This is one of the Sicilian imitatives, probably Svoronos 610.

- Broucheion